Ideas on cause of XD 40 misfire?

[RaginCajun]

UPDATE: After having my smithy take a look, there's nothing we could find to cause this. Looks like a simple case of Booger Hook on Bang Switch.

Fortunately, the only thing hurt in this story was some garage door glass. While getting out of my car this weekend, I inadvertantly dropped my XD 40 on my concrete floor. No worries, the "drop safety" did it's job. When retrieving the gun my hand engaged the grip safety causing a round to be fired. The gun was being held sideways, pointed away, when it discharged. After the discharge a round was chambered that would not eject. After dropping the mag and removing the round with my finger, I reloaded the mage with a couple snap caps and don't seem to have any issues. Now I am nervous about keeping the weapon loaded, As it's my primary HD weapon, I usually carry a FNP 40. Sorry for the long winded post, hopefully ya'll can offer some suggestions. BTW, the gun is all stock and about a 1000 rds with no problems of any kind.

[ThumperIII]

To help with any responses: is pistol fully stock or with modifications, last time cleaned, where and how much lube, any other factor that could contribute? It should not be possible for unmodified properly maintained XD to fire in this manner. Have you disassembled and examined for proper functioning of the internal parts or foreign objects/debris?

[IHS]

I would give SA a call. Maybe send it in for inspection along with a detailed description of what happened.

We all would like to know what they have to say...


IHS

[RaginCajun]

Originally Posted by ThumperIII

To help with any responses: is pistol fully stock or with modifications,

Originally Posted by RaginCajun

BTW, the gun is all stock and about a 1000 rds with no problems of any kind.

Originally Posted by ThumperIII

last time cleaned, where and how much lube, any other factor that could contribute? It should not be possible for unmodified properly maintained XD to fire in this manner. Have you disassembled and examined for proper functioning of the internal parts or foreign objects/debris?

Last time cleaned was 2 weeks ago after a trip to the range. I light mist Remoil on the visible internals(during field strip) and wipe down the externals. I have yet to detail strip the weapon since I've owned it, something I'm not too familiar with, looks like it's gonna have to happen now.

[rayikeo2]

This is only a guess: I am thinking the drop may have caused the striker safety to slip past the safety catch but the grip safety kept the gun from firing. Then when the grip safety was pushed in the striker sprang forward into the primer because it was not behind the catch. That would be a slim to never chance of happening again. But the gun neds to be checked to see if any permanent damage has been done to it.

[addiction]

All the grip safety does is keep the sear from dropping and releasing the striker, so there would have to have been two things happening, one the trigger safety would have to have been disabled, and there would have to be some force on the sear causing it to want to drop, and the grip safety being the only thing stopping it.

If you poke a small screwdriver or something into the rear of an XD you can cause the sear to drop without pulling the trigger, but the grip safety has to be pressed, it takes quite a bit to get it to drop.

However if that is all that happened, then the firing pin safety would have caught the striker and prevented the round from firing.

[Dirty Rod]

Originally Posted by addiction

All the grip safety does is keep the sear from dropping and releasing the striker, so there would have to have been two things happening, one the trigger safety would have to have been disabled, and there would have to be some force on the sear causing it to want to drop, and the grip safety being the only thing stopping it.

However if that is all that happened, then the firing pin safety would have caught the striker and prevented the round from firing.

Excellent summation. I've examined mine enough to know there is not a ton of sear engagement and I've gotten my sear to hang right on the edge of the striker bar when doing safety tests so I can see how it might be possible for the movement of the GS to release the striker but the drop safety should have caught the striker.

[Boris]

Originally Posted by Dirty Rod

......... but the drop safety should have caught the striker.

Unless that spray of lube he puts on the internals has gathered up some carbon and brass shavings causing the striker block safety to get stuck in the 'off' position.

Like I posted on the other drop fired XD thread.... I know of two that have happened to people that are not on the internet.

Only lube the slide needs ANYWHERE is on the cuts the frame rails ride in. Even then it should be an oil that does NOT spider and be put on with a Qtip. Never spray ANY lube that can get in the firingpin safety or the striker channel.......

[agalindo]

1. If there was enough force to cause the sear to release the striker and the striker safety would have had to fail or your striker to break at the area that hits the striker safety.

or

2. The grip safety keeps the sear from going down far enough to drop the striker. For it to have happened as described, the striker safety would have to have been disabled. Maybe by the trigger bar being in a situation where it was binding (stuck under pressure) and pushing up against the safety leaver causing the sear to be under tension and wanting to drop while the only thing holding and keeping it from dropping would have been the grip safety. When you pressed the grip safety the trigger bar continue to push on the sear and the safety leaver pushed the striker safety out of the way of the striker. Hard to imagine it happening. Can you post pics of the striker and striker safety area?

Like I posted before I've drop my XD from about 3 /12 or 4 feet on concrete with no discharge.

[agalindo]

Accounting for the striker safety being stuck in the off position doesn't explain how the striker is release once it has been pulled back to the point where there is enough tension to cause the striker to come forward and set a primer off.